S.C. Code Ann. § 44-53-2530: Reasonable steps required to verify purchasers.

(A) A person who sells or distributes nitrous oxide or nitrous oxide products pursuant to Section 44-53-2520(E) shall take reasonable steps to verify that the purchaser is an exempt entity or is using nitrous oxide or nitrous oxide products for an exempt purpose.

(B) At a minimum, reasonable steps include obtaining and retaining:

(1) the purchaser's business name and business address or personal name and address;

(2) a copy of, or the identifying number for, the purchaser's applicable license, permit, or registration demonstrating exempt entity status, or an electronic copy of the person's driver's license or other government-issued identification; and

(3) an invoice or receipt documenting the date of sale or transfer and the quantity and form of nitrous oxide or nitrous oxide products sold or transferred.

(C)(1) Records required by this section must be retained for not less than two years and must be made available for inspection by the division or local law enforcement during normal business hours upon reasonable request.

(2) The division may inspect premises during normal business hours for enforcement of this article.

(D) The department may promulgate regulations in consultation with the division to administer and enforce the provisions of this article, including purchaser verification standards and recordkeeping requirements. Nothing in this article confers enforcement authority upon the department, and suspected violations shall be referred to appropriate law enforcement.